Resource pools backing this provider vDC. On
create, you must specify a resource pool that
is not used by (and is not the child of a
resource pool used by) any other provider vDC.
On modify, this element is required for schema
validation, but its contents cannot be changed.

The vCenter server that provides the resource
pools and datastores. A valid reference is
required on create. On modify, this element is
required for schema validation, but its
contents cannot be changed.